third_party/web_platform_tests/web-animations/animation-node/animation-node-parent.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>AnimationNode parent attribute tests</title>
<meta name="assert" content="The parent animation group of this animation node or null if this animation node does not have a parent animation group">
<link rel="help" href="http://w3c.github.io/web-animations/#dom-animationnode-parent">
<link rel="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
<link rel="author" title="Aleksei Yu. Semenov" href="mailto:a.semenov@unipro.ru">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../testcommon.js"></script>
<link rel="stylesheet" href="/resources/testharness.css">
<body>
<div id="log"></div>
<script>
test(function() {
    var nodes = [newAnimation(createDiv(this)), new AnimationGroup([]), new AnimationSequence([])];
    nodes.forEach(function(node) {
        assert_equals(node.parent, null, type(node) + '.parent should be null');
    });
}, 'AnimationNode.parent is null if animation node does not have a parent animation group');

test(function() {
    var test = this;
    var parents = [AnimationGroup, AnimationSequence];
    parents.forEach(function(parentCtor) {
        var nodes = [newAnimation(createDiv(test)), new AnimationGroup([]), new AnimationSequence([])];
        nodes.forEach(function(node) {
            var parent = new parentCtor([node]);

            assert_equals(node.parent, parent, type(node) + '.parent should return ' +
                'parent animation group of this animation node');
        });
    });
}, 'AnimationNode.parent returns parent animation group of this animation node');

test(function() {
    var test = this;
    var parents = [AnimationGroup, AnimationSequence];
    parents.forEach(function(parentCtor) {
        var nodes = [newAnimation(createDiv(test)), new AnimationGroup([]), new AnimationSequence([])];
        var parent = new parentCtor([nodes[0], nodes[1], nodes[2]]);
        nodes.forEach(function(node) {
            assert_equals(node.parent, parent, type(node) + '.parent should return ' +
                'parent animation group of this animation node');
        });
    });
}, 'AnimationNode.parent returns parent animation group of this animation node. ' +
    'The group has several children nodes');

// The rest is tested in mutator methods: AnimationNode.before(), AnimationNode.after(),
// AnimationNode.replace(), AnimationNode.remove(),
// AnimationGroup.prepend(), AnimationGroup.append(), AnimationGroup.clone()
</script>
</body>